An analysis of web service SLA management infrastructures based on the C-MAPE model

Quality of service (QoS) management is becoming an integral part of current web services. Contracts are playing a very important role in MAPE-based (monitor, analyse, plan and execute) web service QoS management. Therefore, we propose a general model, contract-MAPE (C-MAPE) model, and based on this model, review five major projects in this area. The analysis results show that these major research projects are quite much following C-MAPE model, whereas they give different support on different aspects. We also analyse possible ways to achieve integrated QoS management, for web services and their compositions. This paper contributes to the understanding of automatic processing of formal contracts, as well as of the relationship between contracts, QoS management systems, and web service provisioning systems.